diff options
Diffstat (limited to 'lib/libkvm/kvm_sh.c')
| -rw-r--r-- | lib/libkvm/kvm_sh.c | 144 |
1 files changed, 115 insertions, 29 deletions
diff --git a/lib/libkvm/kvm_sh.c b/lib/libkvm/kvm_sh.c index 4940acbb7d3..52326a2eec4 100644 --- a/lib/libkvm/kvm_sh.c +++ b/lib/libkvm/kvm_sh.c @@ -1,47 +1,43 @@ -/* $OpenBSD: kvm_sh.c,v 1.1 2006/10/10 22:07:10 miod Exp $ */ +/* $OpenBSD: kvm_sh.c,v 1.2 2007/03/03 21:37:27 miod Exp $ */ /* - * Copyright (c) 2002, Miodrag Vallat. - * All rights reserved. + * Copyright (c) 2007 Miodrag Vallat. * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice, this permission notice, and the disclaimer below + * appear in all copies. * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <sys/param.h> +#include <sys/core.h> +#include <sys/kcore.h> #include <unistd.h> #include <stdlib.h> +#include <nlist.h> #include <kvm.h> #include <db.h> #include "kvm_private.h" +#include <machine/cpu.h> +#include <machine/kcore.h> +#include <machine/pte.h> +#include <machine/vmparam.h> + void _kvm_freevtop(kvm_t *kd) { - if (kd->vmst != NULL) { - free(kd->vmst); - kd->vmst = NULL; - } } int @@ -50,17 +46,97 @@ _kvm_initvtop(kvm_t *kd) return (0); } +/* + * Translate a kernel virtual address to a physical address by walking + * the kernels page table. + */ + +/* Stolen from sys/arch/sh/include/pmap.h we can't really include */ +#define __PMAP_PTP_N 512 /* # of page table page maps 2GB. */ +/* Stolen from sys/arch/sh/sh/pmap.c */ +#define __PMAP_PTP_SHIFT 22 +#define __PMAP_PTP_PG_N (PAGE_SIZE / sizeof(pt_entry_t)) +#define __PMAP_PTP_INDEX(va) (((va) >> __PMAP_PTP_SHIFT) & (__PMAP_PTP_N - 1)) +#define __PMAP_PTP_OFSET(va) ((va >> PGSHIFT) & (__PMAP_PTP_PG_N - 1)) + int _kvm_kvatop(kvm_t *kd, u_long va, paddr_t *pa) { - int offset; + cpu_kcore_hdr_t *h = kd->cpu_data; + u_int l1idx, l2idx; + vaddr_t l2va; + pt_entry_t l1pte, l2pte; + off_t pteoffset; if (ISALIVE(kd)) { _kvm_err(kd, 0, "vatop called in live kernel!"); return (0); } - /* TODO */ + /* + * P1 and P2 segments addresses are trivial. + */ + if (va >= SH3_P1SEG_BASE && va <= SH3_P1SEG_END) { + *pa = SH3_P1SEG_TO_PHYS(va); + return (int)((vaddr_t)SH3_P1SEG_END + 1 - va); + } + if (va >= SH3_P2SEG_BASE && va <= SH3_P2SEG_END) { + *pa = SH3_P2SEG_TO_PHYS(va); + return (int)((vaddr_t)SH3_P2SEG_END + 1 - va); + } + + /* + * P3 segment addresses need kernel page table walk. + */ + if (va >= SH3_P3SEG_BASE && va < SH3_P3SEG_END) { + l1idx = __PMAP_PTP_INDEX(va - VM_MIN_KERNEL_ADDRESS); + l2idx = __PMAP_PTP_OFSET(va); + + /* read level 1 pte */ + pteoffset = h->kcore_kptp + sizeof(pt_entry_t) * l1idx; + if (_kvm_pread(kd, kd->pmfd, (char *)&l1pte, sizeof(l1pte), + _kvm_pa2off(kd, pteoffset)) != sizeof(l1pte)) { + _kvm_syserr(kd, 0, "could not read level 1 pte"); + goto bad; + } + + /* check pte for validity */ + if ((l1pte & PG_V) == 0) { + _kvm_err(kd, 0, "invalid level 1 pte: no valid bit"); + goto bad; + } + + l2va = l1pte & PG_PPN; + if (l2va < SH3_P1SEG_BASE || l2va > SH3_P1SEG_END) { + _kvm_err(kd, 0, "invalid level 1 pte: out of P1"); + goto bad; + } + + /* read level 2 pte */ + pteoffset = SH3_P1SEG_TO_PHYS(l2va) + + sizeof(pt_entry_t) * l2idx; + if (_kvm_pread(kd, kd->pmfd, (char *)&l2pte, sizeof(l2pte), + _kvm_pa2off(kd, pteoffset)) != sizeof(l2pte)) { + _kvm_syserr(kd, 0, "could not read level 2 pte"); + goto bad; + } + + /* check pte for validity */ + if ((l2pte & PG_V) == 0) { + _kvm_err(kd, 0, "invalid level 2 pte: no valid bit"); + goto bad; + } + + *pa = (l2pte & PG_PPN) | (va & PAGE_MASK); + return (PAGE_SIZE - (va & PAGE_MASK)); + } + + /* + * All other addresses are incorrect. + */ + _kvm_err(kd, 0, "not a kernel virtual address"); +bad: + *pa = (paddr_t)-1; return (0); } @@ -70,7 +146,17 @@ _kvm_kvatop(kvm_t *kd, u_long va, paddr_t *pa) off_t _kvm_pa2off(kvm_t *kd, paddr_t pa) { - /* TODO */ + cpu_kcore_hdr_t *h = kd->cpu_data; + phys_ram_seg_t *seg = h->kcore_segs; + off_t off = kd->dump_off; + u_int i; + + for (i = h->kcore_nsegs; i != 0; i--) { + if (pa >= seg->start && pa < seg->start + seg->size) + return (off + (pa - seg->start)); + off += seg->size; + } + + _kvm_err(kd, 0, "physical address out of the image (%lx)", pa); return (0); } - |